## anonymous one year ago Help! Super easy!

1. anonymous

2. anonymous

i like easy questions !

3. anonymous

it is pretty easy right? use pythangoras to get the missing side

4. anonymous

$y^2+84^2=85^2$ solve for $$y$$

5. anonymous

you good from there or you need steps?

6. anonymous

So what do I do with the number? Do I add them, subtract them or divide?

7. anonymous

order of operations

8. anonymous

ok lets take the steps

9. anonymous

you have one number on one side of the equals side what do you do to get them on the other?

10. anonymous

you can do the arithmetic at any time first, last, whatever lets do it first

11. anonymous

$y^2+84^2=85^2$square each (i used a calculator) to get $y^2+7056=7225$

12. anonymous

now two steps to find $$y$$ first subtract $$7056$$ from both sides $y^2=7225-7056\\ y^2=169$

13. anonymous

then take the square root of $$169$$ to find $$y$$$y=\sqrt{169}=13$

14. anonymous

if you have to do a lot of these, there is another way you might get used to

15. anonymous

go right to $y=\sqrt{85^2-84^2}$ and plug that (carefully) in to a calculator i use this http://www.wolframalpha.com/input/?i=sqrt%2885^2-84^2%29